What is poor condition in CardTrader?

Excuse me, could you please elaborate on what constitutes 'poor condition' in the context of CardTrader? Are we referring to the physical state of trading cards, their rarity or scarcity, or perhaps the overall market sentiment towards specific cards? It would be helpful to understand the criteria used to determine poor condition so that traders can make informed decisions and avoid potential pitfalls. Could you also provide some examples or scenarios where a trading card might be considered in poor condition?